Hi, I am new to Tracing. I was trying to use Lttng in my Android based Dragonboard Develop kit. I installed Lttng with Bitbake, by adding below line in conf/local.conf IMAGE_INSTALL_append = " lttng-tools lttng-modules lttng-ust"
After the succesful build and flashing, I can access the Lttng in my platform. Below is the output of "lttng" command */ # lttng* *LTTng Trace Control 2.6.0 - Gaia - v2.6.0* *usage: lttng [OPTIONS] <COMMAND> [<ARGS>]* *Options:* * -V, --version Show version* * -h, --help Show this help* * --list-options Simple listing of lttng options* * --list-commands Simple listing of lttng commands* * -v, --verbose Increase verbosity* * -q, --quiet Quiet mode* * -m, --mi TYPE Machine Interface mode.* * Type: xml* * -g, --group NAME Unix tracing group name. (default: tracing)* * -n, --no-sessiond Don't spawn a session daemon* * --sessiond-path PATH Session daemon full path* * --relayd-path PATH Relayd daemon full path* *Commands:* * add-context Add context to event and/or channel* * calibrate Quantify LTTng overhead* * create Create tracing session* * destroy Tear down tracing session* * enable-channel Enable tracing channel* * enable-event Enable tracing event* * disable-channel Disable tracing channel* * disable-event Disable tracing event* * list List possible tracing options* * set-session Set current session name* * snapshot Snapshot buffers of current session name* * start Start tracing* * stop Stop tracing* * version Show version information* * view Start trace viewer* * save Save session configuration* * load Load session configuration* *Each command also has its own -h, --help option.* *Please see the lttng(1) man page for full documentation.* *See http://lttng.org <http://lttng.org> for updates, bug reports and news.* When I try to create a session. I am getting below error. */ # lttng create test-session* *Spawning a session daemon* *modprobe: ERROR: could not insert 'lttng_tracer': Required key not available* *Error: Unable to load required module lttng-tracer* *Warning: No kernel tracer available* *Session test-session created.* *Traces will be written in /home/root/lttng-traces/test-session-19700101-000212* *Error: Unable to create config file* Error: Command error Please help me. Thanks in Advance. Regards, Paramesh
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